All this so you'd send £26 for a book called Extraordinary Healing by Dr Art Brownstein.

He's a professor of medicine at the University of Hawaii, so surely this can't be bull? We called the university, which described Dr Brownstein as an unpaid assistant clinical professor. He's not working for them, he's just on their list of assistants.

"Dr Brownstein plays no active role at the university," said a spokeswoman.

So we asked the US publisher, Rodale Books of Pennsylvania, to clarify his role at the university, but we've had no response.